I am making The Pioneer Woman's Penne a la Betsy tonight. It is basically a tomato cream sauce with chopped shrimp. I would like to prepare the sauce before our guests arrived except for the addition of the shrimp. Would it be okay to keep it simmering on low for approximately 45 minutes? The last step is to add the chopped shrimp and herbs so I thought I would do this right before I was set to serve. I just do not want to have to be at the stove while company is here.